- Discussion:
- bone marrow signal on
T1- and
T2 vary with age
- in adults,
tumor invading bone marrow will show
decreased signal on T1,
in contrast to normally high signal-intensity bone marrow;
- its imporant to note that traumatic, inflammatory, and neoplastic disorders
will have similar appearances;
- some of lesions will have an
increased signal intensity on T2 sequences
(primary tumor,
metastatic lesions, and infections) while others lesions
will have
low signal on T2 (
leukemia, lymphoma);
- osteonecrosis has consistent decreased signal intensity on
T1 images as
compared to high signal of normal marrow (see
MRI of AVN of
femoral head);
